I had the same problem on Ubuntu 12.04 LTS. After reading this post, I uninstalled the python-webob package and downloaded/installed WebOb 1.4 from http://webob.org/ . That seems to have resolved it.
I had the same problem on Ubuntu 12.04 LTS. After reading this post, I uninstalled the python-webob package and downloaded/ installed WebOb 1.4 from http:// webob.org/ . That seems to have resolved it.